Noninvasive estimation of the lactate threshold in a subject with dissociated ventilatory and pulmonary gas exchange indices: A case report

Brian J. Whipp, Piergiuseppe Agostoni

Research output: Contribution to journalArticlepeer-review

Abstract

This case report describes the responses to incremental work-rate exercise in a healthy subject (with normal pulmonary function), for whom the pulmonary gas exchange (V-slope) and ventilatory-related indexes (ie, ventilatory equivalents and end-tidal partial pressures for O2 and CO 2) uncharacteristically do not occur at the same metabolic rate. Based on the results of additional constant-work-rate exercise tests, we propose that in the (occasional) event of such a dissociation between the V-slope and ventilatory-related responses normally associated with the lactate threshold (θL), then the V-slope index should take priority as the θL estimator.

Original languageEnglish
Pages (from-to)1994-1997
Number of pages4
JournalChest
Volume132
Issue number6
DOIs
Publication statusPublished - Dec 2007

Keywords

  • Acid base
  • Exercise
  • Ventilation

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

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